From c9f3bf46f0de09edb796e35f3dcff349febf75c9 Mon Sep 17 00:00:00 2001
From: Lukasz Kasprzak <lukas@labunix.xyz>
Date: Fri, 24 Jul 2026 10:32:28 +0200
Subject: dayinfo: show feast/day name + colour (modern niedziela + traditional
 missalemeum) in cli/tui/web; v0.5.0

---
 internal/web/render.go | 39 ++++++++++++++++++++++++++++++++++-----
 1 file changed, 34 insertions(+), 5 deletions(-)

(limited to 'internal/web/render.go')

diff --git a/internal/web/render.go b/internal/web/render.go
index 1afee1c..9e6280c 100644
--- a/internal/web/render.go
+++ b/internal/web/render.go
@@ -98,16 +98,45 @@ type ilLineView struct {
 // spans so theme CSS can restyle them; verse/paragraph text is escaped by
 // html/template. lang localises the version-column labels and each section
 // heading's part-label word (render.LocalizeHeading, brief §3b); the
-// citation/verse text is never touched.
-func RenderReadings(secs []liturgy.Section, versions []string, lectionary, display, lang string) template.HTML {
+// citation/verse text is never touched. dayInfo is rendered once, ahead of
+// every layout's own sections, as the day's celebration header (see
+// renderDayInfo) -- never translated (source-language, like the readings/
+// citations), and simply omitted when the source carried none.
+func RenderReadings(secs []liturgy.Section, versions []string, lectionary, display, lang string, dayInfo liturgy.DayInfo) template.HTML {
+	var body template.HTML
 	switch display {
 	case "vertical":
-		return renderTemplate("readings-vertical.html", buildColumnViews(secs, versions, lectionary, lang))
+		body = renderTemplate("readings-vertical.html", buildColumnViews(secs, versions, lectionary, lang))
 	case "interlinear":
-		return renderTemplate("readings-interlinear.html", buildInterlinearViews(secs, versions, lectionary, lang))
+		body = renderTemplate("readings-interlinear.html", buildInterlinearViews(secs, versions, lectionary, lang))
 	default:
-		return renderTemplate("readings.html", buildColumnViews(secs, versions, lectionary, lang))
+		body = renderTemplate("readings.html", buildColumnViews(secs, versions, lectionary, lang))
 	}
+	return renderDayInfo(dayInfo) + body
+}
+
+// renderDayInfo builds the "<p class="dayinfo">" header RenderReadings
+// prepends to the reading pane: the celebration Name as its heading-role
+// span, the temporal Season (if any) as its citation-role span. Reusing
+// those two role classes (rather than inventing new ones) means every
+// existing theme restyles it identically without a new CSS rule -- see
+// base.css/docs/THEMES.md. Returns "" (the header is simply omitted, never
+// an error) when the source yielded no DayInfo (info.Name == "").
+func renderDayInfo(info liturgy.DayInfo) template.HTML {
+	if info.Name == "" {
+		return ""
+	}
+	var b strings.Builder
+	b.WriteString(`<p class="dayinfo"><span class="heading">`)
+	b.WriteString(template.HTMLEscapeString(info.Name))
+	b.WriteString(`</span>`)
+	if info.Season != "" {
+		b.WriteString(` <span class="citation">`)
+		b.WriteString(template.HTMLEscapeString(info.Season))
+		b.WriteString(`</span>`)
+	}
+	b.WriteString(`</p>`)
+	return template.HTML(b.String())
 }
 
 // renderTemplate executes the named embedded template with data, degrading
-- 
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